This low-voltage mattress pad includes a small power supply box that changes 120 volt AC home current into non-hazardous low voltage DC current to provide warmth, protection and safety even if the pad becomes wet. Unlike other warming pads with their thick bulky wires, the heating wires in the Soft Heat pads are so small, they are virtually unnoticeable. Get more product details... (http://amzn.to/y7kuFS)
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